What’s Vulnerable › Vulnerabilities

CVE-2021-22849: Hyweb HyCMS-J1 - Stored XSS

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-22 · updated 2026-06-17
• Weakness: CWE-79

Description

Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.

Affected products

• Hyweb HyCMS-J1: through 7.4.3

References

• https://www.twcert.org.tw/tw/cp-132-4318-09cd3-1.html
• https://www.twcert.org.tw/tw/cp-132-4318-09cd3-1.html

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